U.S. Permanent Representative to the United Nations Nikki Haley (R, Front) speaks after the United Nations Security Council adopted a resolution on the Democratic People's Republic of Korea (DPRK) at the UN headquarters in New York, on Dec. 22, 2017. The Security Council on Friday adopted a new resolution to further tighten sanctions against the DPRK in response to Pyongyang's ballistic missile launch on Nov. 28. (Xinhua/Wang Ying)